No Control Mode

The Motion Control Axis Object supports a No Control application mode where there is no dynamic motor control function. This mode is often used to support Feedback Only or Master Feedback functionality where a feedback channel in a CIP Motion Drive device is serving as a master feedback source to the rest of the control system. This mode could also be applied to integrated CIP Motion Encoder device types where the CIP Motion interface is applied directly to an Encoder.

In this No Control mode of operation, no command value is supplied to the CIP Motion device using the cyclic data connection, but actual position, velocity, and acceleration can be produced by the device to the controller using the cyclic data channel, if applicable. The No Control mode for Feedback Only functionality is illustrated in this diagram:

No Control (Feedback Only)

No Control mode also applies to other CIP Motion device types, such as standalone Bus Power Converters and dedicated Motion I/O device types. Since there is no feedback channel that is associated with these device types, no actual position is returned to the controller.